Japanese Journal of Veterinary Research;Volume 18, Number 1

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A LONG-TERM EPIZOOTIOLOGICAL STUDY OF CHICKEN SALMONELLOSIS ON A FARM WITH REFERENCE TO ELIMINATION OF PARATYPHOID INFECTION BY CLOACAL SWAB CULTURE TEST

SATO, Gihei;MIYAMAE, Takeo;MIURA, Shiro

Permalink : http://hdl.handle.net/2115/1946
JaLCDOI : 10.14943/jjvr.18.1.47

Abstract

A 14-year study of the epizootiology of chicken salmonellosis was described on a broiler farm keeping a closed flock of New Hampshire breeder chickens and conducting a breeder-hatcher plan. Pullorum disease was eradicated by the serological method. The agglutination test adopted for breeder chickens was no value for elimination of Salmonella enteritidis, Salmonella newington or Salmonella senftenberg infection. The single cloacal swab culture test was carried out every year for the detection of carriers from breeder replacement chickens by the age of about 50 days on the basis of results from an experiment on shedding Salmonella in feces and the duration of infection in growing chickens naturally infected with S. newington. Thus no Salmonella of the certain types was recovered from the specimens of dead chickens, dead embryos and hatcher chick fluff 3 years after the onset of the eradication plan. The significance of wild rat (Rattus norvegicus) as a carrier in chicken salmonellosis was indicated and discussed.

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